First pick warp stop motion connection



Sept. 5, 1950 c. E. PELLETIER FIRST PICK WARP STOP MOTION CONNECTION Filed Feb. 25, 1949 6 T a 1 a a F 1 w a 5 2 a a a T J 4 8 n 9 a 9 T M 1 2 a 1 Y J 0 0 6 d O j TTTTTTTT T T T T T T T T T T T T T T T T T T T T T T T T T T T TEE TTTT INVENTOR. K&ar/@s pe/Ze/z'er;

ATTD RN EYE Patented Sept. 5, r 1950 UNITED srArss rATE r 1 OFFICE FIRST PICK WARP STOP MOTION CONNECTION Charles E. Pelletier, Suncook, N. H. Application February 25, 1949, Serial No. 78,341

3 Claims v The present invention relates tothe general class of textile looms and warp stopping'mechanism utilizing an arrestable vibrator, and more specifically to an improved first'pick warp stop motion connection that is especially designed for use with and quick action on warp stop motions of the Draper type. In carrying out my invention the driving power for the warp stop motion is derived from the crank shaft of the loom through the dobby shaft at relatively high speed, and power is transmitted with translation of movement from the rotary crank and operating shafts to the oscillating arm and rock shaft of the warp stop motion, to quickly stop the loom on the first pick. Thus by means of the quick-acting mechanism of my invention the loom is immediately stopped with the breaking of a single warp thread, thereby eliminating the menace of breaking a bunch of warp threads that would result in spoiling material and require the expenditure of time and labor in restoring and setting the operating parts.

The novel driving connection of my invention includes a minimum number of parts that may be manufactured with facility at low cost of production, and the parts, may be assembled with convenience and installed with ease in position on the loom where it is readily accessible for adjustments and repairs, to provide a durable and efiicient mechanism for the performance of its functions.

The invention consists in certain novel features of construction and combinations and arrangements of parts as will hereinafter be described and more particularly set forth in my appended claims.

In the accompanying drawings I have illustrated a complete example of a. physical embodiment of my invention in which the parts are combined and arranged in accord with one mode I have devised for the practical application of the principles Of my invention. It will however, be understood that changes and alterations are contemplated and may be made in these exemplifying drawings and mechanical structures, within the scope of my claims, without departing from the principles of the invention.

Figure l is a side View in elevation showing parts of a warp stop motion for a loom equipped with the driving mechanism and connections of my invention; and

Figure 2 is a front elevation of the mechanism as at line 2-2 of Fig. 1.

In order that the installation and utility of parts may readily be understood I have indicated parts of a Draper type of warp stop motio including the detectors i that are engaged and arrested by the usual drop wires when a warp thread is broken. These detectors are supported and guided in bars 2, actuated by the fingers 3, and the fingers are oscillated by means of an oscillator arm 4 that is mounted upon a rock shaft 5, the usual warp supports W and end brackets B being indicated. The movements of the oscillator or arm 4 and the rock shaft 5, cause one of the levers 6 to depress a plate I for actuating a Bowden wire 8, which is instrumental in stopping the loom in well known manner.

The driving mechanism for oscillating the arm and rocking the shaft of the warp stop motion is activated from the crank shaft 9 of the loom, which is equipped with a sprocket gear l0, and sprocket chain ll passes around a driven gear l2 on the dobby shaft l3 of the loom, which is located above the warp stop motion and provides the operating shaft for the connection to the warp stop motion through the oscillator or arm 4.

On the end of the dobby shaft or operating shaft [3 a crank arm I4 is fixed in adjusted position by means of a set bolt l5 mounted in the hub l6, and the slotted crank arm which revolves with the operating shaft, and the arm 4 are flexibly connected by relatively adjustable parts for translating the rotary movement of the crank arm into vertical oscillating movement of the arm 4 and rocking movement of shaft 5.

For this purpose a dual coupler having a bearing sleeve I1 is journaled by bolt l8 and nut IS in adjusted position on the slotted crank arm H, and a depending integral yoke 20 of the coupler carries a link 2| that is swiveled by bolt 22 and cotter pin 23 in the end of the yoke. The suspending link ZI that reciprocates in a vertical plane is fashioned with a lower tubular portion or collar 24, and the upper end of an angular connecting link or rod 25 is adjustably mounted, and fixed by set screw or bolt 26, in the collar of the link.

At its lower end the connecting rod 25 is fashioned with a horizontally projecting journal 21 that is sWiveled in a bearing block 28, and retained therein by cotter pin 29, and the slotted and forked end 4a of the oscillator or arm 4 is adjustably and pivotally mounted on the journal bearing block by means of a bolt having a cotter pin 3|.

With the loom in normal weaving operations the arm 4 is oscillated in a, vertical plane to rock the shaft 5, and the warp stop motion is controlled by the fault detectors in order that the movement of the oscillator or arm is arrested with the breaking of a first or single warp thread.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In the warp stop motion connection described, the combination with the crank shaft and the dobby shaft of a loom and a Sprocket chain drive between said shafts, and an oscillator arm, of a crank arm on the dobby shaft and a swivel coupling on each of the crank arm and oscillator arm, and a, pivotally connected link and connecting rod flexibly connecting said couplings.

2. In the warp stop motion connection described, the combination with an oscillator having a swivel coupling, the crankshaft and the dobby shaft of a 100m and a sprocket chain. drive between said shafts, and a swivel coupling rotatable with the dobby shaft, of a link pivotally suspended from the swivel coupling of the dobby shaft. a connecting rod fastened to the link, and fa. pivotal connection between the lower end of the rod and the swivel coupling of the oscillator. 3. In the warp stop motion connection for a loom as described, the combination with a crank shaft, a dobby shaft and a sprocket chain drive between these shafts, and an oscillator arm having a slotted and forked outer end, of a slotted crank arm rigid with the dobby shaft, a dual swivel coupler adjustably fixed to the slotted crank arm, a dual swivel coupler adjustably fixed to the end of the oscillator arm, a link pivotally suspended from the coupler of the crank arm, an adjustably fixed rod depending from the link, and a journal on the lower end of the rod pivotally mounted in the coupler of the oscillator arm.

CHARLES E. PELLETIER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,687,471 Davis Oct. 9, 1928 1,719,234 Noyes July 2, 1929 1,826,318 Lundgren Oct. 6, 1931 

